ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2002, vol. 88, p. 520011-520016
Production of prompt charmonia in e+e- annihilation at √s ≈ 10.6 GeV
The production of prompt charmonia was studied using a 32.4 fb -1 data sample collected with the Belle detector. The Belle detector is a large solid-angle spectrometer equipped with a 1.5 T superconducting solenoid magnet. The results showed that the yield of prompt J/ψ mesons in the υ(4S) sample is compatible with that of continuum production.